Shuttle holding means



Oct. 27, 1953 SHUTTLE HOLDING MEANS Filed Sept. 27, 1950 2 Sheets-Sheetl IN V EN TOR.

K. SCH WABE 2,656,858

:"ingthe position-of the sh-uttle-Jduring theschangfine of :,-the weft:bbbhin.

Patented Oct. 27, 1953 TED TATE'S OFFICE 2;656,8 58 SHUHLJEEHOLDINGMEANSKurtisohwahegLe L c e, Switz rland Applicationiseptember 27,1-950,-Serial Nos-1875067 IniSwitzerland September 29, .1949

ilooms having .a m ha ism i for .e tom t zzo llyzeh n ingtheiweitbobbinn hea-ac ur t pw sition'ing of the shuttle with reference to thenewlyzexchanged -weftybobbin islofc-the utmost impontance inaorQertoobtaimthe-correotposition of hn wrbobbinrin:therehuttl In all known-11ooms, ;th -:1p sition of the fshlltt ,du me' th echaneine of th :weit[bobbin .is determin d by aen eeement ofean elem n wi h only o ezp t on'-.of1;the:.shnttle,,that isgonly by-Athepicher, hereas any {additi nalmeans L- DIR IA th hoeit onoof theashuttlejs lackin -3I3he meintenanceofaeeurateposition oftheshuttlednringthelchanemg of the -weftbobbin .18therefore, not .essnrerl, :and lack; of uniformity in the-Dicking'operation influences the positionotthe-shuttle with respect :tothe weft bobbin. Also-(Wearing outmf the perative nartsof the machine,asfor example, wearing of the picker, results inn. chan inguof theposition of theshuttlet .These disadvantages are overcometbytmypresentinvention.

According to my present intentional ,device is provided for holding theshuttle .duning the changing of the weft bobbin ginwa loom ihavinga-nnautomatic, means. f 01' changing i the Weft; .bQ Join, and in this:devicetthe changing of ,the weft bobbin takes place .ontsideflo'f ,theshuttle hox. Accor n to theinvention,lth nos ion o the.shiittlelisfixeclnon, the .onehalld, by, a resiliently mounted stopmeanswh'leh absorbsthe kinetic ene gy of the shuttle, anci, on the'otherhand, bymeans of a stop usurface looatedon=the shuttle the said stepsurface cooperatingwvith' e -pawl which is in'fluence'dhy a spring, thesaid pawl coming in contact with the said'st'op' surface upon returnmovement ofthe shuttle under l the-action -of ClJhETBSilltEIltlY?mounted :stop: means. :Inthis manner, during-r the chan n f? he b b n;the ;,-shuttle :is held between :"the aaesiliently; mounted =st pmeans.- and the pawlienee i ie the stop @surface on the-shuttle.

lack ofyuniformity or wear'in-the-parts of-thei shuttleoperatingmechanism.

An additional object of-my present invention is to provide a; pluralityof elements I for determin- In accordance with the-above considerations,it

.is enobiect. of my present invention te -provide he.meansfor.,acoureitely. detetmining "th p sition Aififillgfillithe otiect:o m p es n i ven n zis1tozn ovid ea lq min hich the weit bobbin ischene h ==-Wh' 1 e the shu tle is located houtside o the shuttle box.

awithfiheiaboye ,qbj cots-in .view,;-my present intention mainly =Q11$1$s of t devi e; fo v:hohiing .e shuttle (lurin therohanein .ofthe weftbobbin time: loomhe ne: e :mwhe ismIoe. automati a ly changing;Qfithewweftmohbin -.takes nlae outs d :of .Z'hfifihllbflfib comprisin ie om inetionre zresllientl amo nted stop izenea in -:one :end ;of ,athtqshuttlexelstop means mounted on e hutthe; sand-amend en nerth gs op,meanst on 1 th shuttle: wh rehyzt'heishu l slo empecl it between:said;resilient yrm untedstone drth wltsogas to Lfixgits nos tion tourint h oil-en ine to t Weft-bobbin.

:inovel :fwtures .wvhieh er .cconsid r characteristic for the inventionare set :forth in nerticul riintthe-i np ncle w l m Th inv tion itself,;.hoWeYer ,-bo h1 s t i s st u ti n and itemethoduof o e ati n, t oether withholditional .zobiectsendodventee s thereo wil e best:.u.nde1:stood li om th ioll w le e c io nfsnecific embod mentswhennread i nnectio with thenccomneh in drawin s i wh h:

Eig. 1;,is aaview ofnone embodiment:of mypre :ent iinvention, c$hQW g :twe e men poi parts thereof .Llurin -1fi c n ing of; the weft bobbin; l 7

Big. ZAista View of. the position-loftthe partsr0f the machine duri g-the oper-ationcof the maichine, that r efore and a te :th w ft b b nihasizbeenwhaneed;

Eig.;;3:;is:a sectional yiew. oneanenlaz 'gied scale taken Qn1,1 I; t n9Fig.1 1;

.Eighlishnetail vi wo eomenart of th psnarotusnend i Ei 5;,isia,:pe-1:tiel Sectional tview taken-on the line 5:5;of;-F.' g-d:.1- l

anatheemhodim n zo th ma hi e fo c ttyting mummy :oreeen invention a ishw the zdraiwingsp theiehuttl r ll-h finfirn QP i A in Whieh is locatedth :we t :bobbin .2- n the operatin mosition {of :the i oom ha ;..shownmFig- 2, the shuttle lo ated :w; 1 in th shut l :bqx 3, theisa-idishuttlenoxphevi tour com artm nts. Th shuttle .:l moopenates witha;,pic k; r .4. lli'ixed -to h exchan e-meme 5 which hismeuntedzsb-ieato hesstationat withlrespecti a picker rail which is notshown in the drawings. After";th8 eomme eemenho -tm one etionrm thewefzbobbinis hene mt eshutt dw f szhohbimi cremate into' herexchen eprojections 25 and 26 on engagement of clined surface 'Sd on the to theaxis of the shuttle and in which a slidable bar I is guided. The loomillustrated does not include any exchange box. This exchange box isreplaced by the exchange bearing 5 which has a U-shaped cross sectionproviding a rail with which the rail 6 cooperates.

In a cutout portion of slidable bar 1 is slidably mounted the rack 8,which comprises two portions 8a and 8b. The movement of rack 8 withrespect to slidable bar I is limited by means of projections cooperatingwith the portions 8b and 8a, respectively. On an outer end of slidablebar I is fixed a spring housing 9, in which a buffer pin I is guided,the said buffer pin I0 cooperating with the picker 4. The buffer pin Itpresses against the spring II located within the spring housing 9. Thebuffer pin I0 is provided with a stop which advantageously is formedbythe nut I2 which is screwed onto threads on the end of an extensionvof buffer pin I9 which extends through an opening at the end of springhousing 9.

A pinion I3 is adapted to engage with and drive the rack 8, the saidpinion being mounted on a shaft I I- which is driven by the motor I5,when the changing of the weft bobbin takes place. On the exchangebearing I6 on which is pivotally mounted pawl II. The upper arm. II ofthe pawl, as viewed in Fig. 1, is adapted to extend through an openingin the rail 6 and to engage suitably shaped recesses 29 and 3G in therack 8 and slidable member 1, respectively, changing of the weft bobbin.On the other arm II" of the pawl II is connected one end of the springI8 which pulls on the pawl II so that arm II thereof is pressed throughthe opening in the rail 6 7 On the rail 6 there is rotatably mountedanother pin I9 to which two-armed control lever 2|. The control lever ismounted the pin the two-armed 1 during the slidable bar I, the said arefixed a pawl 20 and a 7 2I is located in a cutout portion in the rail 6and I is so arranged that it may cooperate with the portion 80 of therack 8. f One arm ofrthe control lever 2I is engaged by a spring 22which tends to rotate the control lever 2I and the pin I9 therewith in acounterclockwise direction, as

viewed in Fig. 2. This counterclockwise movement of the control lever 2|is limited by the stop 2Ia, on the other arm of control lever 2|, withthe rail 6. r

When the weft bobbin changing operationis started, the device forchanging the weft bobbin starts the rotation of means. The pinion motorI5 and drives viewed in Figs. 1 and I3 is thereby driven by the the rack8 to the right, as 2,'so that the rack 8 starts the motor I5 by anyknown" position, as shown in Fig. 1, the pawl 20 moves upwardly underthe influence of spring 22, since the rack 8 comprises a cutout portionbetween portions 81) and 80 thereof which permits a correspondingmovement of control lever 2 I.

At this time, by any known means, the shuttle I is moved toward theposition where the weft bobbin is to be changed, and in this way thepicker 5, which is disconnected from its picker rod, is moved ahead ofshuttle I. The pawl 20 is depressed by the movement of the shuttle Ithereover. The picker 4 then strikes against the head of buffer pin I0and moves the buffer pin I0 against the action of spring I I in springhousing 9 until the kinetic energy of the shuttle I is absorbed,whereupon the spring II then expands and moves the shuttle in a reversedirection, by means of the buifer pin iii and picker 4.

In the meantime, the pawl 20, under the action of spring 22 has entereda groove Ic in the underside of the shuttle I. The righthand end ofgroove Ic, as viewed in Fig. 1, comprises a stop surface Ia which bearsagainst the end of pawl 20. Also, at the end of the movement of elements1 and 8 to the right, as viewed in Fig. 1, pawl. II latches with thealigned recesses 29 and 30.

tween the picker and pawl20, and therebyassumes an accurately determinedposition.

After the operation of exchanging the weft bobbin 2 has been completed,the direction of rotation of the electric motor I5 is reversed by anyknown means. In this way, the rack 8 is then moved by means of pinion I3to the left, as viewed in Fig. 1, whereby the portion 8a of rack 8engages projection126 of slidable bar I so as to move slidable bar Iwith rack 8.

During the initial return movement of rack 8, the cutout portion 29 ofrack 8 depresses pawl !'I so that it is unlatched from engagement withslidable bar I. Also during this return movement, the pawl 20 is movedout of engagement with groove I0 and stop surface Ia by means of portion80 of rack 8 which engages control lever 2| so as to depress controllever 2| and pawl 20 therewith.

In this manner, the shuttle I can move together with the slidable bar Ibackto its operating position, in which position the slidable bar I islatched into position by the engage- V ment of pawl II with the inclinedend 811 of rack 8 and by engagement of projection 25 with portion 8a ofrack 8.

It will be understood that each of the elements described above, or twoor more together,

to travel from the position'shown in Fig. 2 to the position shown inFig. 1. Just after the come mence ment of the drivingof the motor,elements 8 pass through theposition shown in this operation,'the inendof rack 8 depresses upon continued movement of rack I and Fig.4. jAtthestart of pawl I1, and

' Bproiection 25 on slidable bar I is engaged by portion 81) of'rack 8,so that elements I and 8 then move together to the right, as viewed inFig. 1." The movement of elements? and 8 to the right, as viewed in Fig.stop 21. V

'Dur'ing'the movement of rack 8, portion 80 thereof depresses thecontrol lever 2I and in this manner the pawl 1, is limited by the 26 iscorrespondingly depressed. When'the'rach 8 has-reached-its final mayalso find a useful application in other types of looms differing fromthe types described above.

While Ihave illustrated and described the invention as embodied in ashuttle holding means, I do notinte'nd to be limited to the detailsshown, since 7 various modifications and structural changes may be madewithout departing in any way from the spirit of my invention.

Without further analysis, the foregoing will so fully reveal the gist ofmy invention that others can by applying current knowledge readily adaptit for various applications without omitting features that, from'thestandpoint of prior art,

fairly constitute essential oharacteristicsof the generic or specificaspects of this invention, and, therefore, such adaptations should andare intended to be comprehended within the meaning and range ofequivalence of.the following claims.

"the saidresiliently mounted stop comprising a -resi1iently mountedzstopandsai'dppawiso as to {fix its position during the changing of the weftta-genomes 5 B A'doom of the type d'escribed above 4 is zshown outportion "of; saidirail r axsecondaelongatedsbar in my' U. sxPatent252613 96. "slidablyrmountedi imacutohtcportion .ofxsaid first Wh-at Iclaimas 'newand desireto secutel'by mlongated bar, :saidvfirst.andsecond bars being laetters Patent 'is: located within said,shuttle ;box :during :the 1,.op

1. device for holding a shutt-le during the -5 eration of the :loom;ameans z'f'or mroving isaid --changingof the weft bobbin in a loomhaving firstand secondwbars ontsofzzsa idwshnttle;.box'xand "a mechanismfor automatically changin the *along said exchange :bearingttoaxposition Where =:weft bobbin-and I in ivhich "the changing f"' th6"the exchange of: therweft bobbin takesplacmzzstop weftbobbin takesplace outside of theshuttle means mounted on said firstrbarffor eng i b'comprising, :i m at g ii tio :an end of said:;shutt1e so as to:determine .the mounted Stop engaging neendwof ;sa',idrfsh11tt1e-position= of said shuttle uduring srthe o changing of '-'-the saidresiliently mounted 'stop comprising a the :weft bo a :means IfOI'latching Said -5pringm0unted i h i a pinoengaging :shuttle'inthepositionwhereiitzengages'saidrstop Spring at one whereof and wpicker -;.means;jduring::thechangingnofitheiweftJbobbin, mounted between'said pinand'sa-id end of said s s mpr sin a rpivotally sh ttl a stopmeans te onsaid ut mounted'tawl, acgroove:locatedin.;thez.nnderside 'pa 1engaging-Said stop-meanston Said -ofi saidshuttleiand'havingarstopsurfacesadapted shuttle; whereby the said shuttleis clampedbeto-engage an endofisaidlpivotallymounwd m tween Said resiliently-munted Stop andsaidpawl wandua rcontrolfleverl comiectedv tosaidpivotallyto fix imposition. during thebhangmg -"mountedpawltormicving;itsmto;andouttof .en-

weftbobbin gagementwith said gIOOVGrlOCEtQd inrthegunder- "2. A-device'forholding a-shuttle 'during 'the t f q m changing of therweftbgbbin inavloomthavmg ;.5.A:.dev1ce.for holdmgrashuttle durmgathe a mechanismautomatically changing :changing ofthexweffibobbinrin ailoomhavingaoweffvbobbmand whichthe. changing oftthe 2'5nmechamsmftorautomaticallychangmgtheweft weft bobbin takessplacesoutsideof .the.shuttle bohbnriand miwhichz'the changingfofstherweft ibo'x, comprising, incombination, *a resiliently gggggggg s f igggfigfig92 2 12 525222? 5mounted'stop engagmg' one end of sald Shuttle changebearing fixed\EOBEHviJdfEShHtIflQILhflX, airail 7 H V g 3o fixedly tmounted on said-:exchange bearing; :a :33 293222 s igg s f igg g gfi g first-elongatedban sl dably; rnountedun a -cutout between .saidgpin-andsai'd end-ofsaid'shuttle; "p f t 'Second f q i g f f a stopimea'njs mounted onhsaidshuttleya 'pawl "f ,1 "*'F ?m n"? i qfi :engaging-"said stop meanson'tsaidsh-uttle, where- Jf -z i? a f i iba 9 "by ,the "said shuttle isclamped .between said Sam jshnttle'bOXdm-"mg 91 21131011 ofthe-loomsmeans forz'movmgcsaldfirst and second bars'ont of saidshuttlehox andiaiong bobbin; a control lever connected to said pawl;Z2;' f ifiig gfiifiz fi m? f g andrmeans forturning said controlleversothat l 1 9 'saijdxpawl is'moved out of. engagement with said jl' l i isaldmars f themongmahposl' .stop 'meanson said shuttle, wherebysaidshuttle "tlonmgtlmzmashufte" P m mguntgd .isfreeto return*toitsoperating position. saPdLfirstba? f t '3..'A device for holding ashuttle during the j fl to'determllie"thpOs1tl0nof a changing of theweftlbobbin in a loom having i 'i "f a mechanism "for automaticallychanging the 5-f l i t f weft 'bobbin and in which the changing of the"fi h i li i "Sl 'i mm'w weft bobbin'takes place outside of the shuttlehchangmg p l i'l *F box, comprising, in combination, an elongated"meansfoompnslpg. wplvgtany, moumleq'pawha exchange bearing fixed tosaidshuttlebox; .a P9 P d" tofisamflhume raillfixedly mounted on saidexchangekbearing; 5o f t i i aistopqsurf'ace"Named to engagema'nr'a'first elongated bar slidably mounted in a cutf fli 'l fm aoutportionof said rail; a second elongatejdlbar f fl v i l qpivounytmwnted slidably mounted .in a cutout portion of said pa '9"wtomilgagement first :elongated -:bar, said first and "second bars f t fa q groove loomed Home underside being locatedvwithin said shuttle boxduringthe too' f Operation ofttheiloom; omeans i Said 6. devlcedorholdinga'shuttleduringthe first and secondbarsyout of said shuttlvbox"changing P w f ef' bln 'inaloommavin and along said exchange bearing toa position ;mechan.lsm m chg-lngmgthe -where'the exchange-of the weftbobbin'takes F mi whichlthechangmgmofthe place; 7 Stcp means ,mountedsaidhfirst ,barflw weftbobbin' akesyplace outside of'ztiie shuttle "forengaging "an 161111 of said "shuttle so as to 3 w 'combmattoni g adetermine 'the 'position of "said shuttle :during 'exFhangejbaarmg"nxewwfiam 1511111315191); 'the "changing of the "weftbobbin; and meansfixedlywmounted Bald excnflnge n "forlatching-said*shuttiednthepositionwhere first f P 3 13 mounted in acut-"it engages-said stop meansduringthecha-nging -05 t aisecond lon ated.bar f.th ft" bobbin. :shdably mounted inta cutout portion of saidfirst4. A. device for-'holdinga-"shuttle duringthe femgatedybtr'lsaid firstand Second barsbemg changing. of the weftibobbinqnoa m having 7iocatedw1th1n said shuttle box duringthe operaa 'mechanism forautomatically changingthe ofltheloom; means for m Saidfirst we'ft bobbinand in which'the changingof't-he m secmd bars Shuttle box d alon weftbobbin' taken place outside of the shuttle Salli exchange bearing to aposition Where the box, comprising, in-combination, an elongatedexchange of "the'weftbobbin takes p e and exchange bearing fixedto saidshuttlebox; a flr urn ng said bars back to their Original railfixedly'mounted-on said exchange bearing; posit-ion within-the shuttleboX; a plurality a first elongated bar slidably mounted-in'a-cut-' 76pions om a fi s ra'piurality-of porions on said second bar slightlyspaced from said projections on said first bar and adapted to en gagesaid projections on said first bar, whereby said second bar movesindependently of said first bar'until said portions of said second barengage said projections of said first bar so that said first and secondbars then move together; stop means mounted on said first bar forengaging an end of said shuttle so as to determine the position of saidshuttle during the changing of the weft bobbin; and means for latchingsaid shuttle in the position where it engages said stop means during thechanging of the weft bobbin, the said latching means comprising apivotally mounted pawl, a groove located in the underside of saidshuttle and having a stop surface adapted to engage an end of saidpivotally mounted pawl and a control lever connected to said pivotallymounted pawl for moving it into and out of engagement with said groovelocated in the underside of said shuttle.

'7. A device for holding a shuttle during the changing of the weftbobbin in a loom having a mechanism for automatically changing the weftbobbin outside of the shuttle box, comprising, in combination, anelongated exchange bearing fixed to said'shuttle box; a rail fixedlymounted on said exchange bearing; a first elongated bar slidshuttle boxduring the operation of the loom; means for moving said first and secondbars out of said shuttle box and along said exchange bearing to aposition where the exchange of the weft bobbin takes place and forreturning said bars back to their original position within the shuttlebox; a plurality of projections on said first bar; a plurality ofportions on said second bar slightly spaced from said projections onsaid first bar and adapted to engage said projections on said first bar;means for latching said first bar when it arrives at the position wherethe weft bobbin is changed, the said means comprisin a first pawladapted to engage a cutout portion in said first bar and a portion onsaid second bar adapted to engage and move said first pawl into and outof engagement with said'cutout portion of said first bar; stop means'mounted on said first bar for engaging an end of said shuttle; andmeans for latching said shuttle in the position where it engages saidstop means during the changing of the weft bobbin, the said latchingmeans comprising a pivotaily mounted second pawl, a groove located inthe underside of said shuttle and havably mounted in a cutout portion ofsaid rail; a

second elongated bar'slidably mounted in a cutout portion of said firstelongated bar, said first and second bars being located within saidshuttle bax during the operation of the loom; means for moving saidfirst and second bars out of said shuttle box and along said exchangebearing to a position where the exchange of the weft bobbin takes placeand for returning said bars back to their original position within theshuttle box; a plurality of projections on said first bar; a pluralityof portions on said second bar slightly spaced from said projections onsaid first bar and adapted to engage said projections on said first bar;means for latching said first bar when it arrives at the positionwherethe weft bobbin is changed, the said means comprising a first pawladapted to engage a cutout portion of said first bar and a portion onsaid second bar adapt ed to engage and move said first pawl into and outof engagement with said cutout portion of said first bar; stop meansmounted on said first bar for engaging an 1 end of said shuttle so as todetermine the position of said shuttle during the changing of the weftbobbin; and means for latching said shuttle in the position where itengages said stoprmeans during the changing of the weft bobbin, the saidlatching means comprising a pivotally mounted second pawl, a groovelocated in the underside of said shuttle and having a stop surfaceadapted to engage an 'end of said pivotally mounted second pawl and acontrol lever connected to said pivotally mounted second pawl for movingit into and out of engagement with said groove located in the undersideof said shuttle.

8. A device for holding a shuttle during the changing, of the weftbobbin in a loom having a 1 fixed to said shuttle box; a rail fixedlymounted V mechanism for automatically changing the weft bobbin outsideof the shuttle box, comprising, in combination, an elongated exchangebearing fixed to said shuttlejbox; a rail fixedly mounted on saidexchange bearing; a first elongated bar slidably mounted in a cutoutportion of said rail; a second elongated bar slidably mounted in acutout portion of said first elongated bar, said first and second barsbeing located within said ing a stop surface adapted to engage an end ofsaid pivotally mounted second pawl and a control lever connected to saidpivotally mounted second pawl for moving it into and out of engagementwith said groove located in the underside of said shuttle, said controllever comprising a pivotally mounted member adapted to be engaged anddepressed by a portion of said second bar.

9. A device for holding a shuttle during the changing of the weft bobbinin a loom having a mechanism for automatically changing the weft bobbinoutside of the shuttle box, comprising, in combination, an elongatedexchange bearing on said exchange bearing; a first elongated barslidably mounted in a cutout portion of said rail; a second elongatedbar slidably mounted in a cutout portion of said first elongated bar,said first and second bars being located within said shuttle box duringthe operation of theloom;

means for moving said first and second bars out of said shuttle box andalong said exchange bearing to a position where the exchange of the weftbobbin takes place and for returning said bars back to their originalposition within the shuttle box; a plurality of projections on saidfirst bar;

a plurality of portions on said second bar slightly spaced from saidprojections on said first bar and adapted to engage said projections onsaid first bar; means for latching said first bar when it arrives at theposition where the weft bobbin is changed, the said means'comprising afirst pawl adapted to engage a cutout portion in said first bar and aportion on said second bar adapted to engage and-move said first pawlinto and out of engagement with said cutout portion of said first bar;stop means mounted on said first bar for engaging an end of saidshuttle; and means for latching said shuttle in the position where itengages said stop means during the changing of the weft bobbin, the saidlatching means comprising a pivotally mounted second pawl, a groovelocated in the underside of said shuttle and having a stop surfaceadapted to engage an end of said pivotally mounted second pawl and acontrol lever connected to said pivotally mounted second pawl for movingit into and out of engage ment with said groove, said control lever conprising a pivotaily mounted member adapted to be engaged and depressedby a portion of said second bar. I r r r 10. A device for holding ashuttle during the changing of the weft bobbin in a loom having amechanism for automatically changing the weft bobbin outside of theshuttle box, comprising, in combination, an elongated exchange bearingfixed to said shuttle box; a rail fixedly mounted on said exchangebearing; a first elongated bar slidably mounted in a cutout portion ofsaid rail; a second elongated bar slidably mounted in a cutout portionof said first elongated bar, said first and second bars being locatedwithin said shuttle box during the operation of the loom; means formoving said first and second bars out of said shuttle box and along saidexchange bearing to a position where the exchange of the weft bobbintakes place; stop means mounted on said first bar for engaging an end ofsaid shuttle so as to determine the position of said shuttle during thechanging of the weft bobbin, said stop means on said first bar comprisina pin engaging a spring at one end thereof and engaging a picker at theother end thereof, the said picker being mounted between said end ofsaid shuttle and said pin, whereby a resiliently mounted stop isprovided for said end of said shuttle; and means for latching saidshuttle in the position where it engages said stop means during thechanging of the weft bobbin,

11. A device for holding a shuttle during the changing of the weftbobbin in a loom having a a:

mechanism for automatically changing the weft bobbin outside of theshuttle box, comprising, in combination, an elongated exchange bearingfixed to said shuttle box; a rail fixedly mounted on said exchangebearing; a first elongated bar slidably mounted in a cutout portion ofsaid rail; a second elongated bar slidably mounted in a cutout portionof said first elongated bar, said first and second bars being locatedwithin said shuttle box during the operation of the loom; means formoving said first and second bars out of said shuttle box and along saidexchange bearing to a position where the exchange of the weft bobbintakes place and for returning said bars back to their original positionwithin the shuttle box; a plurality of projections on said first bar; aplurality of portions on said second bar slightly spaced from saidprojections on said first bar and adapted to engage said projections onsaid first bar; means for latching said first bar when it arrives at theposition where the weft bobbin is changed, the said means comprising afirst pawl adapted to engage a cutout T Number portion in said first barand a portion on said second bar adapted to engage and move said firstpawl into and out of engagement with said cutout portion of said firstbar; stop means mounted on said first bar for engaging an end of saidshuttle and comprising a pin engaging a spring at one end thereof andengaging a picker at the other end thereof, the said picker beingmounted between said end of said shuttle and said pin; and means forlatching said shuttle in the position where it engages said stop means,the said latching means comprising a pivotally mounted second pawl, agroove located in the underside of said shuttle and having a stopsurface adapted to engage an end of said pivotally mounted second pawland a control lever connected to said pivotally mounted second pawl formoving it into and out of engagement with said groove, said controllever comprising a pivotally mounted member adapted to be engaged anddepressed by a portion of said second bar.

12. A device as defined in claim 11 and wherein said pin or said stopmeans is provided with an extension passing through an opening in a housing in which said spring of said stop means is mounted; and a stopmember on said extension located outside of said housing, whereby saidstop member limits the movement of said pin by engagement with saidhousing.

13. A device as defined in claim 12 and wherein a stop means is providedfor limiting the movement of said first and second bars toward theposition where the weft bobbin is to be exchanged.

14. A device as defined in claim 13 and wherein said second bar is inthe form of a rack and said means for moving said first and second barscomprises a pinion in engagement with said second rack bar and areversible motor operatively connected to said pinion.

KURT SCHWABE.

References Cited in the file of this patent UNITED STATES PATENTS NameDate 973,128 Northrup Oct. 18, 1910 2,306,286 Turner Dec. 22, 1942FOREIGN PATENTS Number Country Date 26,143 Great Britain of 1911 403,168Great Britain Dec. 21, 1933

